Screen printing press



A 1943 R. ORTHWINE SCREEN PRINTING PRESS Filed Aug. 16, 1941 4Sheets-Sheet l INVENTOR.

. Rana; oer/1 WINE.

ATTORNE April 1943' R. ORTHWINE 2,315,730

SCREEN PRINTING PRESS Filed Aug. 16, 1941 4 Sheets-Sheet 2 INVENTOR. RUDOL F ORTH l'V/NEv BY uf flaw/M A TTORNEY April 6, 1943. R. ORTHWINE SCREEN PRINTING PRESS 4 Sheets-Sheet 3 Filed Aug. 16, 1941 FRONT TY mm m a. m m m M M A R. ORTHWINE SCREEN PRINTING PRESS 4 Sheets-Sheet 4 Filed Aug. 16, 1941 FIG.

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Maw/W ATTOENEK Patented Apr. 6, 1943 UNITED STATES PATENT OFFICE SCREEN PRINTING PRESS Rudolf Orthwine, New York, N. Y.

Application August 16, 1941, Serial No. 407,151

2 Claims. (01. 101-126) This invention relates to a screen printing press.

The object of the invention is the production of a printing press which will expedite printing with either single or multiple colors.

A second object of the invention is the production of a printing press, by means of which a material printed-upon can be removed from the printing press, and again positioned therein in the exact same position.

A third object of the invention is the production of a screen printing press in which the material printed upon is held in place by other than hand pressure.

Various other objects of the invention will be apparent from the specification and drawings.

In the drawings Fig. 1 represents a side elevation of the improved screen printing press in operative position; Fig. 2 is a top view of Fig. 1; Fig. 3 shows a right hand side view of Fig. 1;

Fig. 4 shows a view similar to Fig. 1 with its movable parts in a different position; Fig. 5 is a side view similar to Fig. 4 with its essential moving elements in a raised locked position;

Fig. 6 represents an enlarged plan view of a portion of the screen end of the swinging frame of the printing press; Fig. '7 is a section of Fig. 6

on the line 1, 1; Fig. 8 indicates a partial end view of Fig. 6 with the locking handle in open frame removed; Fig. 12 is a front elevation of Fig. 11; Fig. 13 indicates an enlarged section of Fig. 11 on the line l3, I3 and Fig. 14 shows an enlarged section of Fig. 11 on the line |4, M.

The screen printing press comprises the supporting table designated in its entirety by the numeral 28. The table 26 comprises the top table member 2| with its front 2|a, the rear 2 lb, and sides 2lc. The table is shown with the four legs 22. Each pair of the legs 22 at the sides of the supporting table 20, is provided with the gusset plate 25, and the four braces 26. A supporting brace 21 connects a pair of the legs 22 on each side of the table. The said top table member 2|, see Figs. 11 to 14 inclusive for details, has provided therefore adjusting means as follows: Across the member 2| extends the dovetail center slot 3| and a pair of dovetail side slots 32 on the opposite sides of the slot 3|. A dovetail slide 33 engages the dovetail slot 3| and is of equal length with the top table member 2|. A set screw 34 maintains the slide 33 in operative position. In each of the sideslots 32 is adjustably positioned a dovetail slide 35. The slides 35 are shorter in length than the center slide33. The slides 35 are maintained in operative position by the set screws 36. Adjacent to front end of each of the slides 35 is indicated a rectangular recess 46.. In each recess 46 is slidably positioned a clamping member 4|, held in extended position by the springs 42, which are maintained in position by'the pins 43, which extend up from the bottom 44 of the recess 40. The clamping members'4l have each a clamping finger 45 extending therefrom toward the other side of the table 2 lb. At each of the sides 2lc of the table member 2| are indicated a pair of dovetail side slots 46,

frame member of the printing press is indicated in its entirety by the numeral 60.

The member comprises the rectangular top member 6|, preferably of angle iron, and which comprises the front portion 6|a, the side portions Bio and the rear portion 6|c. Diagonal braces 62 and the cross brace 63 are provided to stiifen the top member 6 I.

An extension 64 projects from the center of the rear portion 6|c and the latter is shown with the extension lug 65. A connecting rod 68 with the adjustable buckle 69 has one end 10 pivoted to the extension 64 and its other end 1| is pivoted to the swinging arm 12. The said arm 12 is pivoted at 13 to the supporting table 20, by means of a pair of lugs 14 of each of the braces 21. The end 16 of the arm 12 is connected to the foot pedal 11 by means of the connecting link 18. The end 19 of the foot pedal 11 is pivoted to the supporting table 26 by means of the lugs extending from the braces 21. A pulley; 84 is shown with the frame 85, and the latter extends from the extension lug 65. A short cable 86 extends over the pulley 85, and its ends are connected to one end of the springs 81. Connecting members 88 extend from the other ends of the springs 81. The other ends of the connecting members 88 are connected to the lugs 89 extending from a pair of the legs 22 of the table 20.

The swinging frame member 60 is pivoted to the top table member 2I, by means of the lugs 92, that extend from the top table member 2I.

Referring to Figs. 6 to 10 inclusive for details, a screen frame 95 is shown with the four members 96, 91, 98 and 99. The frame 95 has connected to its lower side a screen I preferably of silk which has outlined thereon a design D, indicated thereon by outlining the same through covering surfaces not to be printed, which is well known in the art.

I'he said covering is accomplished by means of shellac or any other simple and conventional material used in the art. 7 H

The front portion of the screen frame 95 is secured to the lower side of the rectangular top member 6I by means of the pins IOI secured to the frame members BIa and which extend into openings I02 of the frame member 96. The rear portion of the screen frame 95 is secured to the rectangular top member 6|, by means of spring locks I05.

The locks I05 each comprise a U-shaped frame member I06 secured to the side portion 61b of the rectangular top member 6|. An operating handle I08 having the handle portion I09 and the locking portion IIO, which latter extends through the U frame member I06, through the opening III in the side portion BIb and extends into an opening II2 of the frame member 91. The opening II2 preferably is provided with a metal lining H3. The front side of said opening is enclosed as indicated at H4. The locking portion IIO has integral therewith the collar IIB, which functions as a spring rest for the springs II9 which encircle the locking portion H0, and also encircles the short sleeve member I20, which latter is secured to the inside of the front wall I2I of the frame member I06. The purpose of the sleeve member I20 is to prevent interference of the spring II9 with the stop pin I22. The said stop pin I22 bears against the outer face of the front wall I2I, when the operating levers I08 are in disengaged position as shown in Fig. 9. To prevent the operating lever I08 from being withdrawn too far, a stop collar I23 is integral with the locking portion 0 of the opening lever I08. To look the frame 95 to the top member til, the operating lever I08 is turned 90 degrees from the position shown in Fig. 8, thereby causing the stop pin I22 to enter the opening I24 of the front wall I2I, thereby permitting the springs II9 to push the locking portions I'I0 into the openings II2 of the frame members .91. Since the front walls II of the openings 'II2 are inclined, the locking portion III] will bear against the inclined wall II'4 of the linings H 3 and thereby pressing the entire screen frame 95, which moves toward the pins IOI in the "front portion Glu and thereby positions the frame 95 tightly against the front portion 61a.

The operation of the improved printing press is as follows.

Referring to the drawings, the screen frame 95 has been locked to the lower side of the member 60, see Fig. 4, by pushing said frame 95 into engagement with the pins II, and then looking the frame 95 to the top member 60, by means of the locks I05 as described.

A paper P is now positioned upon the top table member 2I, as indicated in broken lines, in Fig. 11, by utilizing the clamping members II and the guide blocks 48. Foot pressure is now exerted upon the foot pedal 11 in the direction of the arrow I25, see Fig. l and thereby the swinging arm I2 is swung and the connecting rod 68 is raised, thereby causing the screen frame 95 to contact the paper P. Ink or paint is placed on the top of the silk screen I00, and forced through openings left in the screen when the desi n D was prepared, by means of passing a squeegee over the surface of the screen I00 in the conventional manner. The design D will be printed on the paper P. By releasing the foot pedal I1 7 the swinging frame member 60 is returned to its original position shown in Fig. 4. The paper P is now removed and another paper is placed on top of the table member 2|. The arrangement of the clamps number 45 and the guide blocks 48, will insure every paper P to be located in the identical position on the top of the table member 2 I. It may be necessary sometimes to repair the silk screen I00, by covering small tears, rips or holes with Scotch tape, shellac, glue, or any simple form of filler. To facilitate this Work the swinging frame 60 is held in an almost perpendicular position as shown in Fig. 5, by raising the swinging frame 60 manually and then holding the same in that position, by foot pressure against the pedal TI.

Various modifications may be made in the invention and the present exemplification is to be taken as illustrative and not limitative thereof.

Having described the invention I claim 1. In a screen printing press the combination of a table having a plurality of dovetail slots, some of said slots extending the entire width of the table, the balance of said slots at right angles to the other slots, the second lot of slots extending adjacent to the other slots, a slide in 'each slot, means "to maintain the slides in different operative positions, a recess at one end of some of the slides, a clamping member slidably engaged in said recess, a clamping finger connected to one end of clamping member, helical prings interposed between said clamping member and said recess to maintain the clamping member in extended position when not in use and means to securely clamp the material to be printed when a printing medium is pressed thereon.

2 In a screen printing press the combination of a table, a swinging frame member pivoted to the table, a screen frame connected to said swinging frame member by means of a plurality of stationary-pins on one end of the swinging frame member and a plurality of movable locking pins extending into openings of the screen frame, said openings being tapered on the side nearest to the stationary pins to provide 'a tight engagement of said screen from against the front member ofthe swinging frame by means of said locking pins sliding against the tapered sides of the openings in the screen frame.

RUDOLF ORTHWINE. 

